LDK320ADU33R
Overview
The LDK320ADU33R is a high-performance linear voltage regulator from STMicroelectronics that delivers up to 200mA of output current from an input voltage as high as 18V. This LDO features a fixed 3.3V output with extremely high Power Supply Rejection Ratio (PSRR) and low quiescent current, making it ideal for noise-sensitive circuitry in battery-powered applications. Its thermal and short-circuit protection features ensure robust operation within a wide temperature range of -40C to 125C.
Why Choose This Part
The LDK320ADU33R offers an exceptional PSRR of up to 88dB, effectively filtering ripples from switching regulators or noisy power supplies. It features high output accuracy of 0.5 percent at 25C and a very low shutdown current of 1uA, making it highly efficient for power-sensitive designs.
Applications
Key Specifications
Getting Started
When designing with the LDK320ADU33R, ensure the use of low-ESR ceramic capacitors (typically 1uF) at the input and output for stability. The SOT-89 package provides a balance between size and thermal performance, but designers should verify PCB copper area for heat dissipation at high Vin-Vout differentials. Layout should keep the output capacitor as close as possible to the regulator pins to minimize lead inductance.
